ambassador, chris stevens, and three other americans in libya. there is a report that two men from tunisia were held for questioning in turkey. and abc news has a provocative document tonight. it is a request from the americans on the ground in libya for help with protection. it raises the question about the state department's response and abc's jake tapper shows us that document. >> reporter: the members of the u.s. military serving as security support team at the u.s. embassy in tripoli, libya, wanted to keep a small airplane in the country. according to a government source, that was so the team, changed with providing extra security at diplomatic posts, could travel around the country along with their weapons. but state department officials in washington denied that request, according to a may 3rd e-mail obtained by abc news. copied on the e-mail was u.s. ambassador chris stevens, later killed in a terrorist attack on the diplomatic post in benghazi on september 11th, along with three other americans. an attack that has prompted a house oversi